Myosin Molecule

Q.

Which of the following is a contractile protein of a muscle?

1. Actin

2. Tubulin

3. Tropomyosin

4. Myosin

Q. The contractile protein of skeletal muscle involving ATPase activity is

1. Troponin
2. Myosin
3. Tropomyosin
4. Alpha - actinin

Q. Which of the following statements are true about myosin?
I. Myosin is made of meromyosin.
II. Each meromyosin has two parts - HMM and LMM
III. The tail is the light meromyosin i.e. LMM
IV. The head with short arm is heavy meromyosin i.e. HMM

1. III
2. I and II
3. I, II, III and IV
4. IV

Q.

Label the part of myosin structure

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1. Myosin heads Tail Actin binding sites ATP binding sites

2. ATP binding sites Tail Myosin heads Actin binding sites

3. Actin binding sites Tail ATP binding sites Myosin heads

4. Myosin heads Tail ATP binding sites Actin binding sites

Q. Which of the following is a component of the contractile protein called myosin?

1. Troponin
2. Meromyosin
3. Tropomyosin
4. Both a and c